This tutorial uses Hooke's law to solve a physics problem in order to calculate the spring constant (spring stiffness).
In physics, the spring constant is how much force is required to extend the spring by a unit amount.
For example, the spring constant could be 0.3 N/cm. Note that non-standard units for extension are often used, e.g. cm or mm.
If a material or spring obeys Hooke's Law, then the extension of the material is directly proportional to the force applied.
Check out the complete Forces & Mass physics course at: gcsephysicsninja.com/lessons/...